Matches are replayed within the actual League of Legends client, allowing full quality replays, with negligible performance impact while playing the game and file sizes much smaller than video. The camera may also be freely controlled while playing a replay, alowing the viewer to spectate whichever area they are most interested in.

alot of you have probably heard of this already but i thought id post it anyways, you can upload your replays so others can download and watch your games.

I would upload one of my own but i dont really have an great games recorded.